﻿using System;
using System.Collections.Generic;
using System.Text;

namespace Calulator
{
    public interface Iwel
    { string Print();}

    public class Arithmetic:Iwel
    {
        private int _num1;
        private int _num2;
        public Arithmetic() { }

        public Arithmetic(int num1, int num2)
        {
            _num1 = num1;
            _num2 = num2;      
        }

        public int Num2
        {
            get;
            set;
        }

        public string Print()
        {
            return "欢迎使用接口";
        }
    }


}
